Elton w



E. W. WALBORN.

AUTOMATIC DRAFT REGULATOR.

APPLICATION FILED OCT. 16. m4.

1 20,298. Patented Oct. 28, 1919.

I 6 a I I Ell/Wall barn ELT ON wALBoRNoF GRNA'ION, PENNSYLVANIA.

" AUTOMATIC DRAFT-REGULATOR.

To all wliom it may concern.

Be it known that I, ELTON WALBonN,

- a citizen of the United States, residing at Canton, in the county of Bradford and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Draft-Regulators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to automatic draft regulators designed for use in connection w1th smoke boxes on locomotives and can be used in chimneys or other outlets for furnacesto regulate the draft by admitting the air in the required quantity to insure complete combustion of the fuel, and one of the principal objects of the invention is to provide a device of simple construction which will operate automatically to admit air to the smoke box or-smoke stack to regulate the draft, the damper of said regulator being hinged and connected to a spring which can be adjusted to make the damper operate automatically for supplying air.

The foregoing and other objects maybe attained by means of the construction illustrated in the accompanying drawing, in which- Figure 1 is a longitudinal sectional view of the draft regulator, and

Fig. 2 is an end view.

Referring to the drawing by reference nu.- merals, 1 designates a fragmentary portion of a locomotive smoke box. At any suitable point, the smoke box 1 is provided with an opening 1 to permit of theapplication of my improved draft regulator.

The draft regulator comprises a comparativelylong pipe which consists of an innersection 2 and an outer section 3. These sections are of relatively different diameters, and they are arranged eccentrically to position a portion of the inner section 2 beyond a portion of the outer section 3, the space between the sections being partially closed Specification of Letters Patent. 7 Patented 0017. 28, Applicationtiled October 16. 1914. Serial No, 866,966.

, a :bracket 8 .carried by the. section 3 and 1 which is provided with a manipulating head 9. Through the medium of the nut 10 being turned on the bolt 7 the tension of the spring 6 may be regulated and controlled.

The draft regulator is applied to the smoke box 1 by passing the smaller section 3 through the opening 1*, and it is secured in position in any suitable manner. To permit a small, but continuous supply of fresh air to the smoke box 1, the valve seat 3 is indented as at 11 to provide a by-pass be tween the sections 3 and'2 about the damper 5. This supply of fresh air to the smoke box prevents the creation of an excessive draft through the fire box under ordinary running conditions, such for instance, as when the locomotive is traveling over a level stretch of track. This amount of fresh air entering the smoke box would not prevent the creation of an excessive draft through the fire box when the locomotive is ascending a grade for the reason that during such time the exhaust becomes very heavy. This increase in the exhaust would, however, cause the valve 5 to open and let into the smoke box sufficient air to prevent the increased exhaust from creating through the fire box, a draft that would tend to lift the fire from the grate bars and create holes therein.

It should be apparent from the foregoing description, taken in connection with the accompanying drawing, that I provide a draft regulator which will effectively prevent an increase in the exhaust from creating a draft through the fire box that would lift. the fire from the grate bars and create holes therein. It should also be apparent that the device is simple, durable and effective,

and that it may be readily and quickly applied to a smoke box at very little cost.

Various changes may be made in the details of construction without departing from the spirit and scope of the invention as defined in the claim.

What is claimed is:

A draft regulator for locomotives comprising an air feed pipe passing through the wall of the smoke box of the locomotive, the inner section of the pipe having a greater diameter than the outer section and arranged eccentrically with relation to the outer section, a wall connecting the projecting part of the inner pipe section to the adjacent part of the outer pipe section and forming a valve seat, a valve pivoted Within ascending a grade to permit a larger quan- 10 the larger section, resilient means normally tity of air to enter the smoke box.

holding the valve seated, said valve seat being In testimony whereof I afiix my signaincilented to provide a by-palsos arena? the ture in presence of two witnesses.

va ve to permit a continuous, ut sma sup- T ply of fresh air to be fed to the smoke box EiJToN WALBORB during ordinary running conditions, and said Witnesses valve being adapted to be opened on the P. B, ADAMS,

increase in the exhaust when the train is FRANKLIN BAXTER.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of ratents,

7 Washington, D. G." 

